project / drawbot
Drawbot
A two-axis drawing robot I built with a friend during the Fall 2014 BoilerMake hackathon.
2014BoilerMakeArduino
Control electronics
An Arduino ran custom stepper-motor control software and coordinated the machine's motion. A discrete shift-register circuit selected the motor coils, and eight power MOSFETs amplified those control signals to drive the two stepper motors.
The red LEDs in the prototype video show which of the four coils in each motor is energized.